Bill.com offers Free Trial, but Wave does not.
Wave is designed for Freelancers and Small Business.
Bill.com is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
The starting price of Bill.com begins at $0/user/month, while pricing details for Wave are unavailable.
Some top alternatives to Wave includes Quickbooks, Xero, Freshbooks, Sage Accounting (Sage One), Zoho Books, FreeAgent, TimePay, QuickFile, Reach Accountant, Qonto, Invoiced, QuickBooks Payroll and WavePayroll.
Some top alternatives to Bill.com includes AvidXchange, APXPRESS, Paypool, Melio, QuickFile, InvoiceWorks, Tipalti, Stampli and Enverus OpenInvoice.